Large numbers of rehmannia roots were produced during the production of pills of six drugs with rehmannia, these herb residues were rich in organic substances such as protein, starch, cellulose, anthrone, lignin, alkaloid and the microelement, etc. If the utilization of these drugs for resource reuse by anaerobic digestion was considered, the conversion from organic solid waste to clean energy could realize. So, it would achieve a win-win situation between environment and energy. The anaerobic experiments of rehmannia roots were conducted in self-prepared reactors under 37±1℃, with the rehmannia roots to anaerobic sludge ratios were 2:1, 1:1, 1:2 and 0:1(expressed as raw material). Compared the volume and production rate of methane and kinetic constant, the result indicated the 0 order reaction time was 0~12h, the maximum yield of gas production were 757 mL, and the kinetic constant k was 2.34mL/h g VS, when the rehmannia roots to anaerobic sludge ratios was 1:1. Two tests were carried out at the same condition, a little microelement was added in one reactor, and run against a control of reactor without microelement. The results showed microelement had little effect on gas production of anaerobic digestion of rehmannia roots. So there were rich microelement contained in the rehmannia roots to satisfy the growth of the anaerobic bacterium.%在六味地黄丸制造过程中会产生大量的地黄药渣,该药渣富含蛋白质、淀粉、纤维素,葱酮、木质素、生物碱和微量元素. 若利用厌氧消化技术对该固体废物进行资源化处理,能够实现从有机固体废物到清洁能源的转换,达到环境与能源的双赢. 文章通过自制厌氧消化器,以地黄药渣为原料,在37±1℃条件下进行研究,分别设置地黄药渣/接种污泥总固体质量比2:1,1:1, 1:2,0:1,对比各消化器产气速率、产甲烷总量、产甲烷动力学常数等.结果表明,当地黄药渣/接种污泥的总固体质量比为1:1时,产气效果最佳,其0级反应的时间为0~12h,产气量为757 mL,产气动力学常数k为2.34 mL/h.另取两组厌氧消化器在相同条件下实验,只向其中一个消化器添加微量元素,结果表明外加微量元素对地黄药渣厌氧消化的影响不大,说明地黄药渣含有足够的微量元素满足厌氧菌的生长要求.
展开▼
